Improvement in apparatus for stippling metal surfaces



' R. DIMES.

Improvement in Apparatusfor St ippling Metal Surfaces. NO.12'8,290. Patentedlune 25,1872.

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RICHARD DIMES, OF NEW YORK, N. Y., ASSIGNOR TO TIFFANY & 00., OF SAME PLACE.

IMPROVEMENT IN APPARATUSFOR STIPPLING METAL SURFACES.

Specification forming part of Letters Patent No. 128,290, dated June 25, 1872.

To all whom it may concern:

Be it known that I, RICHARD Dnvms, of the city, county, and State of New York, have invented a new and useful Device for Stippling and Dressing the Surfaces of Metal and other substances; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawingforming part of this specification.

This invention is more especially intended for stippling and dressing the surfaces of silver-ware and other goods composed of metal; but it is applicable to the stippling of all kinds of metallic surfaces, and imparts thereto a frosted or a matted or a brightened finish, as may be desired. My improved device is composed of a series of stippling-points made of metal or other material, loosely jointed to and swinging from a chuck or mandrel that revolves with such rapidity as to cause the said points to fly out radially from their chuck, so that when any metallic surface is brought into contact with said points the said surface will be indented or stippled, as will be hereinafter more fully shown and described.

Similar letters of reference indicate corre- 'sponding parts.

Figure 1 is a front elevation of my improved stippling device. Fig. 2 is a side sectional elevation of the same.

A is a spindle or chuck, provided at one end with a screw-nut, a, by which it maybe screwed upon the mandrel of a lathe. The opposite end of the chuck is provided with a suitable number of loops, b, which receive links 0, each of which has two-perforations, through one of which passes a loop, 1). Through the other perforation the stipplingpoints d pass, and in which they are secured by the sliding caps e, as shown. The stippling-points are composed of metal, preferably of elastic wire. Each link is intended to carry several of the stippling' points, which may be of greater or less size, according to the nature of the stipplin g action that may be required. When the chuck A is made to revolve with sufiicient rapidity the jointed stippling-points will swing or stand out radially straight from the chuck, and if a goblet, B, or other article to be stippled, matted, or dressed be held in such aposition thatthe flying stippling-points will strike it, the said points will produce indentations in the surface of the article, and the elasticity of the stippling-points, together with the joints of their links, will enable them to bend sufficiently to pass the goblet or other article, after the points have struck it, as shown in the drawing. The. surface of the article thus presented to the action of the stippling-points will in this manner be quickly covered with minute indentations, whereby a stippled, matted, or frosted appearance of great beauty is obtained at a small cost. If it is desired to keep portions of the surface of the article smooth, to form a figure, a shield of metal or other material is placed over the part that is to be kept smooth during the operation of the stippling device.

Various forms or kinds of stippling may be produced by increasing or diminishing the number or sizes of the stippling-points.

The loops 1) may be attached in any suitable manner to the chuck A, but I prefer to attach the loops to a chuck-head, b, or to make the loops in one piece with the chuck-head b, as shown in the drawing. The said chuck-head consists of a cap or a disk of metal fitted upon the extremity of the chuck, and having as many attached arms as there are to be loops, the said arms being bent over to form the loops b, as shown. The chuck-head b is secured to the extremity of the chuck by screws f or other suitable fastening.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1-. A stippling device, made and operating substantially as herein shown and described.

2. The chuck a, with its attached stipplingpoints, made and oper. ting substantially as described.

3. The combination of the links 0, caps e, and stippling-points d, substantially as shown and described.

4.. The chuck-head I) carrying the loops 1), made substantially as shown and described.

RICHARD DIMES. Witnesses:

Gno. W. MABEE, T. B. Mosnnn. 

